当前位置：
X-MOL 学术
›
Adv. Energy Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Two-Electron Phenothiazine Based Cathode Achieved by Raising HOMO Energy Level for High Performance Lithium Organic Battery
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-09-03 , DOI: 10.1002/aenm.202403029 Sen Zhang 1 , Jia Cai 1 , Heyang Li 1 , Fangfang Xing 1 , Ling Chen 1 , Xiujuan Wang 1 , Xiaoming He 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-09-03 , DOI: 10.1002/aenm.202403029 Sen Zhang 1 , Jia Cai 1 , Heyang Li 1 , Fangfang Xing 1 , Ling Chen 1 , Xiujuan Wang 1 , Xiaoming He 1
Affiliation
|
Redox-active p-type phenothiazine based organic cathodes have captured increasing attention for lithium-organic batteries due to their high voltage output and rich chemical modification. However, their capacities are generally limited to one redox event per molecule; while the di-cation states are subject to rapid decomposition and cannot be effectively utilized. Herein, a scalable synthesis of phenothiazine-based polymer (MPT-CC) is reported, that can fully utilize the two-electron storage by raising its highest occupied molecular orbital (HOMO). Lithium-organic batteries using this polymer as cathode displayed a high specific capacity of 178 mAh g−1 at 0.2 A g−1. This polymer also displays excellent cycling stability. After 1000 cycles at 0.2 A g−1, a stable capacity of 194 mAh g−1 with ≈100% capacity retention can be obtained. Even at 2 A g−1 after 10,000 cycles, 98 mAh g−1 can be reversibly achieved. Its practical applicability has been successfully demonstrated in MPT-CC//graphite full cell, also displaying good performance. This work contributes to a major advancement of phenothiazine-based polymer design for high performance energy storage devices.
中文翻译：
通过提高HOMO能级实现高性能锂有机电池双电子吩噻嗪基正极
氧化还原活性p型吩噻嗪基有机正极由于其高电压输出和丰富的化学修饰而引起了锂有机电池越来越多的关注。然而，它们的容量通常仅限于每个分子一次氧化还原事件；而双阳离子态则容易分解，无法有效利用。在此，报道了吩噻嗪基聚合物（ MPT-CC ）的可扩展合成，该聚合物可以通过提高其最高占据分子轨道（HOMO）来充分利用双电子存储。使用这种聚合物作为正极的锂有机电池在0.2 A g -1下表现出178 mAh g -1的高比容量。该聚合物还表现出优异的循环稳定性。在0.2 A g -1下循环1000次后，可以获得194 mAh g -1的稳定容量，容量保持率约为100%。即使在10,000次循环后在2 A g -1下，也可以可逆地实现98 mAh g -1 。其实用性已在MPT-CC //石墨全电池中得到成功验证，也表现出良好的性能。这项工作有助于高性能储能设备的吩噻嗪基聚合物设计的重大进步。
更新日期：2024-09-03
中文翻译：
通过提高HOMO能级实现高性能锂有机电池双电子吩噻嗪基正极
氧化还原活性p型吩噻嗪基有机正极由于其高电压输出和丰富的化学修饰而引起了锂有机电池越来越多的关注。然而，它们的容量通常仅限于每个分子一次氧化还原事件；而双阳离子态则容易分解，无法有效利用。在此，报道了吩噻嗪基聚合物（ MPT-CC ）的可扩展合成，该聚合物可以通过提高其最高占据分子轨道（HOMO）来充分利用双电子存储。使用这种聚合物作为正极的锂有机电池在0.2 A g -1下表现出178 mAh g -1的高比容量。该聚合物还表现出优异的循环稳定性。在0.2 A g -1下循环1000次后，可以获得194 mAh g -1的稳定容量，容量保持率约为100%。即使在10,000次循环后在2 A g -1下，也可以可逆地实现98 mAh g -1 。其实用性已在MPT-CC //石墨全电池中得到成功验证，也表现出良好的性能。这项工作有助于高性能储能设备的吩噻嗪基聚合物设计的重大进步。
京公网安备 11010802027423号